KR101251518B1 - Dosing module for exhaust after-treatment system of vehicle - Google Patents

Dosing module for exhaust after-treatment system of vehicle Download PDF

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KR101251518B1
KR101251518B1 KR1020100125531A KR20100125531A KR101251518B1 KR 101251518 B1 KR101251518 B1 KR 101251518B1 KR 1020100125531 A KR1020100125531 A KR 1020100125531A KR 20100125531 A KR20100125531 A KR 20100125531A KR 101251518 B1 KR101251518 B1 KR 101251518B1
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exhaust gas
dosing
vehicle
reducing agent
guide member
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KR20120064345A (en
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현기수
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기아자동차주식회사
현대자동차주식회사
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Priority to KR1020100125531A priority Critical patent/KR101251518B1/en
Priority to JP2011126396A priority patent/JP5779410B2/en
Priority to US13/174,075 priority patent/US20120144812A1/en
Priority to DE102011051875.4A priority patent/DE102011051875B4/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/25—Mixing by jets impinging against collision plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/421—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path
    • B01F25/423—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components
    • B01F25/4231—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions by moving the components in a convoluted or labyrinthine path by means of elements placed in the receptacle for moving or guiding the components using baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

차량의 배기가스 후처리 시스템용 도징 모듈이 개시된다. 개시된 차량의 배기가스 후처리 시스템용 도징 모듈은, SCR의 전방에서 배기가스의 유동 방향을 따라 환원제를 분사하기 위한 것으로서, ⅰ)SCR과 연결될 수 있는 연결부와, 배기가스가 유입될 수 있는 유입부를 지닌 도징 본체와, ⅱ)도징 본체에 구비된 보스부재에 장착되며 환원제를 도징 본체의 내부로 분사하는 인젝터와, ⅲ)도징 본체의 내부에 설치되며 유입부를 통해 도징 본체로 유입되는 배기가스의 유동을 일정 경로로 가이드 하는 가이드부재를 포함한다.A dosing module for an exhaust gas aftertreatment system of a vehicle is disclosed. The dosing module for the exhaust gas aftertreatment system of the disclosed vehicle is for injecting a reducing agent along the flow direction of the exhaust gas in front of the SCR, i) a connection portion that can be connected to the SCR, and an inlet portion through which the exhaust gas can be introduced. A dosing body mounted on the dosing body, ii) an injector mounted on the boss member provided in the dosing body, and iii) an injector for injecting a reducing agent into the dosing body, and iii) a flow of exhaust gas introduced into the dosing body through an inlet. It includes a guide member for guiding in a predetermined path.

Description

차량의 배기가스 후처리 시스템용 도징 모듈 {DOSING MODULE FOR EXHAUST AFTER-TREATMENT SYSTEM OF VEHICLE}Dosing module for vehicle exhaust aftertreatment system {DOSING MODULE FOR EXHAUST AFTER-TREATMENT SYSTEM OF VEHICLE}

본 발명의 예시적인 실시 예는 차량의 배기 시스템에 관한 것으로서, 보다 상세하게는 배기가스의 후처리를 위한 선택적 촉매 환원(Selective Catalyst Reduction: 이하 'SCR' 이라고 한다) 장치의 도징 모듈에 관한 것이다.An exemplary embodiment of the present invention relates to an exhaust system of a vehicle, and more particularly, to a dosing module of a selective catalytic reduction (SCR) device for post-treatment of exhaust gas.

일반적으로, 엔진의 배기 시스템은 배기 가스 중에 함유된 공해 물질인 디젤 입자상 물질(PM) 및 질소산화물(NOx) 등을 감소시키기 위해 DOC(Diesel Oxidation Catalyst), DPF((Diesel Particulate matter Filter) 및 SCR(Selective Catalyst Reduction) 등과 같은 배기가스 후처리 장치를 구비하고 있다.In general, an exhaust system of an engine is a diesel oxidation catalyst (DOC), a diesel particulate matter filter (DPF), and an SCR to reduce diesel particulate matter (PM), nitrogen oxides (NOx), and the like contained in exhaust gas. And an exhaust gas aftertreatment device such as (Selective Catalyst Reduction).

이 중에서, SCR은 인젝터를 통해 배기 가스의 유동 방향으로 분사되는 환원제(우레아)가 배기 가스의 열에 의해 암모니아(NH3)로 가수분해 되고, 배기 가스 중의 질소산화물과 암모니아의 촉매 반응으로서 질소산화물을 질소 가스(N2)와 물(H2O)로 환원시키는 것이다.Among them, in the SCR, the reducing agent (urea) injected in the flow direction of the exhaust gas through the injector is hydrolyzed to ammonia (NH 3 ) by the heat of the exhaust gas, and nitrogen oxide is used as a catalytic reaction of the nitrogen oxide and ammonia in the exhaust gas. It is to reduce with nitrogen gas (N 2 ) and water (H 2 O).

상기에서와 같은 DOC, DPF 및 SCR을 채용한 종래 기술의 배기가스 후처리 장치는 일 예로서 DOC와 DPF를 배기 가스의 유동 방향으로 장착하고 DPF의 후단에 SCR을 장착하고 있다. 그리고, DPF와 SCR 사이에는 환원제를 분사하기 위한 인젝터를 지닌 도징 모듈을 구비하고 있다.The exhaust gas aftertreatment apparatus of the prior art employing the DOC, DPF, and SCR as described above is equipped with DOC and DPF in the flow direction of the exhaust gas as an example, and the SCR is mounted to the rear end of the DPF. In addition, a dosing module having an injector for injecting a reducing agent is provided between the DPF and the SCR.

종래 기술의 도징 모듈에서는 EM(emission) 기준 강화에 따라 인젝터를 통한 환원제의 분사압을 증대시켜 그 분사압 증대에 따른 환원제의 분사 속도를 증가시키고 있다. The dosing module of the prior art increases the injection pressure of the reducing agent through the injector in accordance with the strengthened EM (emission) standards to increase the injection speed of the reducing agent according to the increase in the injection pressure.

그런데, 종래 기술에서는 환원제의 분사 속도 증가에 따른 직진성 증가로 인해 배기가스 통로의 공간에서 환원제의 일부가 증발되지 않고, 배기가스 통로의 내 벽면에 우레아 고형물이 퇴적되는 월 웨팅(wall wetting) 현상을 나타낸다는 문제점을 내포하고 있다.However, in the prior art, a wall wetting phenomenon in which a portion of the reducing agent does not evaporate in the space of the exhaust gas passage due to an increase in the linearity with increasing injection speed of the reducing agent, and urea solids are deposited on the inner wall of the exhaust gas passage Representation has a problem.

즉, 환원제의 월 웨팅 현상은 SCR의 촉매 활성화 및 질소산화물의 정화 효율을 저하시키는 요인으로 작용하고, 환원제가 배기가스 통로의 내 벽면에서 증발하는 경우 그 환원제가 배기가스 통로의 내 벽면에 부착된 고형물로 남게 되어 결과적으로는 환원제의 분사량 제어가 어려워지는 문제를 야기시킨다.That is, the wall wetting phenomenon of the reducing agent acts as a factor to lower the catalyst activation of the SCR and the purification efficiency of the nitrogen oxide. When the reducing agent evaporates from the inner wall of the exhaust gas passage, the reducing agent adheres to the inner wall of the exhaust gas passage. This remains a solid and consequently causes a problem of difficulty in controlling the injection amount of the reducing agent.

한편, 종래 기술의 다른 예는 상기와 같은 월 웨팅 현상을 방지하기 위해 인젝터를 통하여 분사되는 환원제를 배기가스와 혼합하기 위한 믹서를 배기가스 통로에 구비하고 있다.On the other hand, another example of the prior art has a mixer in the exhaust gas passage for mixing the reducing agent injected through the injector with the exhaust gas in order to prevent the wall wetting phenomenon as described above.

그런데, 이 경우는 배기가스 통로에 믹서를 설치하므로, 전체 장치를 구성하기 위한 재료비가 증가하게 되고, 내구성의 검증이 필요하다는 문제점을 내포하고 있다.By the way, in this case, since the mixer is provided in the exhaust gas passage, the material cost for constituting the entire apparatus increases, which implies that the durability needs to be verified.

다른 한편으로, 종래 기술의 또 다른 예는 상기와 같은 월 웨팅 현상을 방지하기 위해 배기가스 통로의 곡관 부위에 인젝터를 장착하여 그 곡관 부위를 지나는 배기 가스로 환원제를 분사할 수 있는 구성을 제공한다.On the other hand, another example of the prior art provides a configuration capable of injecting a reducing agent into the exhaust gas passing through the curved portion by mounting an injector in the curved portion of the exhaust gas passage to prevent the wall wetting phenomenon as described above .

그런데, 이 경우는 인젝터를 배기가스 통로의 곡관 부위에 설치함에 따라, 환원제(우레아)가 배기 가스의 열에 의해 암모니아(NH3)로 가수분해할 수 있도록 공간적 거리 확보가 필요하다. 따라서 거리 확보를 위한 배기관의 형상이 필요하며, 전체 후처리 레이아웃이 복잡해지고, 차량의 레이아웃 상 인젝터의 설치가 용이하지 않다는 문제점을 내포하고 있다.In this case, however, as the injector is installed in the curved pipe portion of the exhaust gas passage, it is necessary to secure a spatial distance so that the reducing agent (urea) can hydrolyze into ammonia (NH 3 ) by the heat of the exhaust gas. Therefore, the shape of the exhaust pipe for securing the distance is required, and the overall post-processing layout is complicated, and the installation of the injector is not easy due to the layout of the vehicle.

본 발명의 예시적인 실시 예들은 곡관 부위로 환원제를 분사하거나 배기관에 믹서를 설치하지 않고서도 환원제의 월 웨팅 현상을 근본적으로 방지할 수 있고, SCR 효율을 더욱 향상시킬 수 있도록 한 차량의 배기가스 후처리 시스템용 도징 모듈를 제공한다.Exemplary embodiments of the present invention fundamentally prevent the wall wetting phenomenon of the reducing agent without spraying the reducing agent to the curved portion or installing the mixer in the exhaust pipe, and after exhaust of the vehicle to further improve the SCR efficiency. Provided is a dosing module for a processing system.

본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈은, SCR의 전방에서 배기가스의 유동 방향을 따라 환원제를 분사하기 위한 것으로서, ⅰ)상기 SCR과 연결될 수 있는 연결부와, 배기가스가 유입될 수 있는 유입부를 지닌 도징 본체와, ⅱ)상기 도징 본체에 구비된 보스부재에 장착되며 상기 환원제를 상기 도징 본체의 내부로 분사하는 인젝터와, ⅲ)상기 도징 본체의 내부에 설치되며 상기 유입부를 통해 도징 본체로 유입되는 배기가스의 유동을 일정 경로로 가이드 하는 가이드부재를 포함한다.The dosing module for the exhaust gas aftertreatment system of a vehicle according to an exemplary embodiment of the present invention is for injecting a reducing agent along the flow direction of the exhaust gas in front of the SCR, iii) a connection portion that can be connected to the SCR, A dosing body having an inlet for introducing exhaust gas, ii) an injector mounted on the boss member provided in the dosing body and injecting the reducing agent into the dosing body; And a guide member for guiding the flow of the exhaust gas flowing into the dosing body through the inlet part in a predetermined path.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 가이드부재는, 상기 도징 본체에 대해 상기 연결부와 유입부 측을 구획 형성하는 플레이트 형태로서 이루어질 수 있다.In addition, in the dosing module for the exhaust gas post-treatment system of the vehicle, the guide member may be formed as a plate form partitioning the connection portion and the inlet side with respect to the dosing body.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 가이드부재는 상기 유입부 측에서 상기 도징 본체의 내 벽면에 일단부가 고정되고 타단부가 상기 내 벽면으로부터 떨어지며 라운드 형태로서 굴곡지게 이루어질 수 있다.In addition, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the guide member is fixed to the inner wall surface of the dosing main body on the inlet side and the other end is bent in a round shape with the other end away from the inner wall surface. Can be.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 가이드부재에는 다수의 구멍들이 형성될 수 있다.Further, in the dosing module for the exhaust gas aftertreatment system of the vehicle, a plurality of holes may be formed in the guide member.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 도징 본체에는 상기 가이드부재와 결합되며 상기 유입부를 형성하는 배플부재가 설치될 수 있다.In addition, in the dosing module for the exhaust gas post-treatment system of the vehicle, the dosing body may be provided with a baffle member coupled to the guide member to form the inlet.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 배플부재는 상기 도징 본체에 대하여 상기 유입부를 제외한 부분을 커버링 하는 플레이트 형태로 이루어질 수 있다.In addition, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the baffle member may be formed in the form of a plate covering the portion except the inlet portion with respect to the dosing body.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 배플부재는 상기 가이드부재와 도징 본체의 내 벽면 사이에 배기가스의 유동 통로를 형성할 수 있다.Further, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the baffle member may form a flow passage of the exhaust gas between the guide member and the inner wall surface of the dosing body.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 배플부재는 상기 도징 본체에 대하여 상기 유입부 측으로 경사지게 배치될 수 있다.In addition, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the baffle member may be disposed to be inclined toward the inlet side with respect to the dosing body.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 인젝터는 상기 보스부재에 배기가스의 유동 방향을 따라 경사지게 장착될 수 있다.Further, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the injector may be mounted to the boss member inclined along the flow direction of the exhaust gas.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 인젝터는 상기 가이드부재의 라운드 부위를 향하여 환원제를 분사할 수 있다.In addition, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the injector may inject a reducing agent toward the round portion of the guide member.

또한, 상기 차량의 배기가스 후처리 시스템용 도징 모듈에 있어서, 상기 연결부는 상기 SCR과 상호 연결되는 연결 통로를 상기 도징 본체의 하부에 형성할 수 있다.In addition, in the dosing module for the exhaust gas aftertreatment system of the vehicle, the connection portion may be formed in the lower portion of the dosing body connecting passages interconnected with the SCR.

상술한 바와 같은 본 발명의 예시적인 실시 예에 따르면, 곡관 부위로 환원제를 분사하거나 배기관에 믹서를 설치하지 않고서도 환원제의 월 웨팅 현상을 방지할 수 있으므로, 차량 레이아웃의 제약을 받지 않고, 배기가스와 환원제 분무의 혼합 촉진, 균일도 향상 및 반응 활성화에 따른 SCR의 효율을 증대시킬 수 있다.According to the exemplary embodiment of the present invention as described above, since the wall wetting of the reducing agent can be prevented without spraying the reducing agent to the curved portion or installing a mixer in the exhaust pipe, the exhaust gas is not restricted by the vehicle layout. The efficiency of SCR can be increased by promoting mixing of the reducing agent spray, improving uniformity and activating the reaction.

이 도면들은 본 발명의 예시적인 실시 예를 설명하는데 참조하기 위함이므로, 본 발명의 기술적 사상을 첨부한 도면에 한정해서 해석하여서는 아니된다.
도 1은 본 발명의 예시적인 실시 예가 적용되는 차량의 배기가스 후처리 시스템을 개략적으로 도시한 블록 구성도이다.
도 2는 본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈을 도시한 분해 사시도이다.
도 3은 도 2의 결합 정면 구성도이다.
도 4a 및 도 4b는 본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈의 작용을 설명하기 위한 도면이다.Since these drawings are for reference in describing exemplary embodiments of the present invention, the technical spirit of the present invention should not be construed as being limited to the accompanying drawings.
1 is a block diagram schematically illustrating an exhaust gas aftertreatment system of a vehicle to which an exemplary embodiment of the present invention is applied.
2 is an exploded perspective view illustrating a dosing module for an exhaust gas aftertreatment system of a vehicle according to an exemplary embodiment of the present disclosure.
3 is a combined front configuration diagram of FIG. 2.
4A and 4B are views for explaining the operation of a dosing module for an exhaust gas aftertreatment system of a vehicle according to an exemplary embodiment of the present disclosure.

이하, 첨부한 도면을 참고로 하여 본 발명의 실시 예에 대하여 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 상세히 설명한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시 예에 한정되지 않는다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 동일 또는 유사한 구성요소에 대해서는 동일한 참조 부호를 붙이도록 한다.In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

또한, 도면에서 나타난 각 구성의 크기 및 두께는 설명의 편의를 위해 임의로 나타내었으므로, 본 발명이 반드시 도면에 도시된 바에 한정되지 않으며, 여러 부분 및 영역을 명확하게 표현하기 위하여 두께를 확대하여 나타내었다.In addition, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to those shown in the drawings, and is shown by enlarging the thickness in order to clearly express various parts and regions. It was.

도 1은 본 발명의 예시적인 실시 예가 적용되는 차량의 배기가스 후처리 시스템을 개략적으로 도시한 블록 구성도이다.1 is a block diagram schematically illustrating an exhaust gas aftertreatment system of a vehicle to which an exemplary embodiment of the present invention is applied.

도면을 참조하면, 본 발명의 예시적인 실시 예는 상용 차량의 디젤 엔진으로부터 배출되는 배기가스를 정화하기 위한 배기가스 후처리 시스템(200)에 적용될 수 있다.Referring to the drawings, an exemplary embodiment of the present invention may be applied to an exhaust gas aftertreatment system 200 for purifying exhaust gas emitted from a diesel engine of a commercial vehicle.

여기서, 상기 배기가스 후처리 시스템(200)은 예를 들면, 배기 라인의 도중에 구성되는 DOC(1)와, DOC(1)의 후단에 구성되는 DPF(3)와, DPF(3)의 후단에 구성되는 SCR(5)을 포함한다.The exhaust gas aftertreatment system 200 is, for example, a DOC 1 formed in the middle of the exhaust line, a DPF 3 formed at the rear end of the DOC 1, and a rear end of the DPF 3. SCR 5 configured.

이 경우, 상기 DOC(1)는 배기 가스 중의 총 탄화수소와 일산화탄소를 산화시키고, 일산화질소를 이산화질소로 산화시키는 기능을 한다.In this case, the DOC 1 functions to oxidize the total hydrocarbons and carbon monoxide in the exhaust gas and to oxidize nitrogen monoxide to nitrogen dioxide.

상기 DPF(3)는 배기 가스에 포함된 입자상 물질을 포집하기 위한 촉매 담체가 형성되어 입자상 물질을 화학적 변환 과정을 통하여 정화시키게 되는 것이다.The DPF 3 is a catalyst carrier for trapping particulate matter contained in the exhaust gas is to purify the particulate matter through a chemical conversion process.

그리고, 상기 SCR(5)은 DOC(1)와 DPF(3)를 거치며 발생된 질소산화물을 요소(urea) 수용액과 같은 환원제를 이용하여 질소 기체로 환원시키는 것이다.In addition, the SCR (5) is to reduce the nitrogen oxide generated through the DOC (1) and the DPF (3) to nitrogen gas using a reducing agent such as an aqueous solution of urea.

즉, 상기 SCR(5)은, 환원제가 배기 가스의 산화열에 의해 암모니아로 전환됨으로써, 촉매에 의한 배기 가스 중의 질소산화물과 암모니아의 촉매 반응으로서 질소산화물을 질소 가스와 물로 환원시킬 수 있다.That is, the SCR 5 can reduce nitrogen oxides to nitrogen gas and water as a catalytic reaction of nitrogen oxides and ammonia in the exhaust gas by the catalyst by converting the reducing agent into ammonia by the heat of oxidation of the exhaust gas.

한편, 상기 배기가스 후처리 시스템(200)은 DPF(3)와 SCR(5) 사이에 구성되고 있는 본 실시 예에 따른 도징 모듈(100)을 포함하는 바, 이 도징 모듈(100)은 SCR(5)의 전방에서 배기가스의 유동 방향을 따라 환원제를 분사하기 위한 것이다.Meanwhile, the exhaust gas aftertreatment system 200 includes a dosing module 100 according to the present embodiment, which is configured between the DPF 3 and the SCR 5, and the dosing module 100 includes an SCR ( It is for injecting a reducing agent along the flow direction of the exhaust gas in front of 5).

상기에서와 같은 본 실시 예에 따른 도징 모듈(100)은 차량 레이아웃의 제약을 받지 않고, 배기가스와 환원제 분무의 혼합 촉진, 균일도 향상 및 반응 활성화에 따른 SCR(5)의 효율을 증대시킬 수 있는 구조로 이루어진다.The dosing module 100 according to the present embodiment as described above can increase the efficiency of the SCR (5) by promoting the mixing of the exhaust gas and reducing agent spray, uniformity improvement and reaction activation without being restricted by the vehicle layout. Made of structure.

도 2는 본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈을 개략적으로 도시한 분해 사시도이고, 도 3은 도 2의 결합 정면 구성도이다.2 is an exploded perspective view schematically illustrating a dosing module for an exhaust gas aftertreatment system of a vehicle according to an exemplary embodiment of the present disclosure, and FIG. 3 is a combined front configuration view of FIG. 2.

도면을 참조하면, 본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈(100)은 기본적으로, 도징 본체(10)와, 인젝터(30)와, 가이드부재(50)와, 배플부재(70)를 포함하여 구성되며, 이를 구성 별로 설명하면 다음과 같다.Referring to the drawings, the dosing module 100 for the exhaust gas post-treatment system of a vehicle according to an exemplary embodiment of the present invention, the dosing main body 10, the injector 30, the guide member 50 and It is configured to include a baffle member 70, which will be described below for each configuration.

본 실시 예에서, 상기 도징 본체(10)는 도 1에서와 같은 배기가스 후처리 시스템(200)의 DPF(3)와 SCR(5) 사이에서 이들과 상호 연결되게 구성될 수 있다.In this embodiment, the dosing body 10 may be configured to interconnect with them between the DPF 3 and the SCR 5 of the exhaust gas aftertreatment system 200 as in FIG. 1.

상기 도징 본체(10)는 한쪽 면이 폐쇄되고 다른 한쪽 면이 개방된 원통 형태로서 이루어지며, DOC(1)와 DPF(3)를 거친 배기가스가 유입될 수 있는 유입부(11)와, SCR(5)과 연결될 수 있는 연결부(13)를 구성한다.The dosing main body 10 is formed in a cylindrical shape in which one side is closed and the other side is opened, and an inlet part 11 through which the exhaust gas passed through the DOC 1 and the DPF 3 can be introduced, and the SCR. It constitutes a connecting portion 13 that can be connected with (5).

상기 유입부(11)는 배기가스가 유입될 수 있는 입구로서, 뒤에서 더욱 설명될 가이드부재(50)와 배플부재(70)를 통하여 도징 본체(10)의 다른 한쪽 면에 구성될 수 있다.The inlet 11 is an inlet through which exhaust gas can be introduced, and may be configured on the other side of the dosing body 10 through the guide member 50 and the baffle member 70 which will be described later.

이러한 유입부(11)를 형성할 수 있는 가이드부재(50)와 배플부재(70)의 결합 구조는 뒤에서 자세하게 설명될 것이다.The coupling structure of the guide member 50 and the baffle member 70 which can form such an inlet 11 will be described in detail later.

상기 연결부(13)는 파이프(도면에 도시되지 않음)를 통하여 SCR(5)과 상호 연결되는 바, 그 SCR(5)과 상호 연결되는 연결 통로(12)를 형성하고 있다.The connecting portion 13 is interconnected with the SCR 5 through a pipe (not shown), and forms a connecting passage 12 interconnected with the SCR 5.

여기서, 상기 연결 통로(12)는 도징 본체(10)의 내부 단면적 보다 상대적으로 작은 단면적으로 지니며 도징 본체(10)의 하부 측에 형성될 수 있다.Here, the connection passage 12 may have a smaller cross-sectional area than the internal cross-sectional area of the dosing main body 10 and may be formed on the lower side of the dosing main body 10.

그리고, 상기 도징 본체(10)의 상측에는 뒤에서 더욱 설명될 인젝터(30)를 장착하기 위한 보스부재(15)가 장착될 수 있다.In addition, a boss member 15 for mounting the injector 30, which will be described later, may be mounted on the upper side of the dosing main body 10.

상기 보스부재(15)는 도징 본체(10)의 내부 공간과 상호 연결되는 개방부(도면에 도시되지 않음)를 형성하며 그 도징 본체(10)의 외주면에 용접 설치된다.The boss member 15 forms an opening (not shown) interconnected with the inner space of the dosing main body 10 and is welded to the outer circumferential surface of the dosing main body 10.

이 경우, 상기 보스부재(15)는 도징 본체(10)의 외주면에 있어 상단부 정 중앙에서 한 쪽 방향으로 일정 거리 치우치게 장착되는 바, 그 보스부재(15)에는 인젝터(30)를 장착하기 위한 장착 브라켓(17)이 설치될 수 있다.In this case, the boss member 15 is mounted on the outer circumferential surface of the dosing main body 10 so as to be biased a predetermined distance from the center of the upper end in one direction. The boss member 15 is mounted to mount the injector 30 to the boss member 15. The bracket 17 may be installed.

상기에서, 인젝터(30)는 도징 본체(10)의 내부로 환원제를 분사하기 위한 것으로서, 보스부재(15)의 개방부에 장착 브라켓(17)을 통해 장착된다. 인젝터(30)는 보스부재(15)에 배기가스의 유동 방향을 따라 경사지게 장착될 수 있다.In the above, the injector 30 is for injecting a reducing agent into the dosing main body 10, and is mounted through the mounting bracket 17 at the opening of the boss member 15. The injector 30 may be mounted to the boss member 15 inclined along the flow direction of the exhaust gas.

이러한 인젝터(30)는 당 업계에서 배기 계통에 장착되는 공지 기술의 2차 분사장치로서 이루어지므로, 본 명세서에서 그 구성의 더욱 자세한 설명은 생략하기로 한다.Since the injector 30 is made in the art as a secondary injector of a known technique mounted on an exhaust system, a detailed description of the configuration will be omitted herein.

본 실시 예에서, 상기 가이드부재(50)는 위에서 언급한 바 있는 유입부(11)를 통해 도징 본체(10)로 유입되는 배기가스의 유동을 일정 경로로 가이드 하기 위한 것이다.In this embodiment, the guide member 50 is for guiding the flow of the exhaust gas flowing into the dosing main body 10 through the inlet 11 as mentioned above in a predetermined path.

또한, 상기 가이드부재(50)는 인젝터(30)를 통해 분사되는 환원제와 배기가스의 혼합을 촉진하고 환원제의 미립화를 촉진하여 배기가스와 환원제의 혼합 균일도를 향상시킬 수 있는 기능을 하게 된다.In addition, the guide member 50 serves to promote the mixing of the reducing agent and the exhaust gas injected through the injector 30 and to promote the atomization of the reducing agent to improve the uniformity of the mixing of the exhaust gas and the reducing agent.

상기 가이드부재(50)는 도징 본체(10)의 내부에 구성되는 바, 도징 본체(10)에 대해 연결부(13)와 유입부(11) 측을 구획 형성하는 플레이트 형태로 이루어진다.The guide member 50 is configured in the interior of the dosing main body 10, and is formed in a plate shape for partitioning the connection part 13 and the inlet part 11 with respect to the dosing main body 10.

여기서, 상기 가이드부재(50)는 도징 본체(10)의 한쪽 면 및 내 벽면에 용접 설치되는 바, 유입부(11) 측에서 내 벽면에 일단부가 고정되고 타단부가 그 내 벽면으로부터 떨어지게 설치된다.Here, the guide member 50 is welded to one side and the inner wall of the dosing main body 10, one end is fixed to the inner wall on the inlet 11 side and the other end is installed to be separated from the inner wall surface. .

이 경우, 상기 가이드부재(50)는 타단부 측이 대략 반원 형태로 라운드지고, 일단부 측이 완만하게 라운드지며 도징 본체(10)의 내 벽면에 용접 접합될 수 있다.In this case, the guide member 50 may be rounded in the form of a semi-circle on the other end side, and smoothly rounded at one end side, and welded to the inner wall of the dosing main body 10.

상기와 같이 가이드부재(50)의 타단부 측에 라운드 부위(51)(이하에서는 편의 상 "라운드부" 라고 한다)를 형성하는 이유는 도징 본체(10)로 유입되는 배기가스에 강한 선회류를 발생시킴으로써 배기가스와 환원제의 혼합 및 공간 균일도를 향상시키기 위함이다.The reason for forming the round portion 51 (hereinafter referred to as “round portion” for convenience) on the other end side of the guide member 50 as described above is to provide a strong swirl flow to the exhaust gas flowing into the dosing main body 10. This is to improve the mixing and space uniformity of the exhaust gas and the reducing agent by generating.

그리고, 상기 가이드부재(50)의 전 영역에는 다수의 구멍들(53)이 천공 형성되는 바, 이러한 구멍들(53)은 인젝터(30)로부터 분사되는 환원제와 가이드부재(50)에 의해 가이드되는 배기가스의 혼합을 촉진시키는 기능을 하게 된다.In addition, a plurality of holes 53 are formed in all regions of the guide member 50, and the holes 53 are guided by the reducing agent and the guide member 50 injected from the injector 30. It serves to promote the mixing of exhaust gases.

한편, 상기 인젝터(30)는 언급한 바 있는 보스부재(15)에 의해 도징 본체(10)의 상단부 정 중앙에서 한 쪽 방향으로 일정 거리 치우치게 장착되므로, 가이드부재(50)의 라운드부(51)를 향하여 분사될 수 있다.On the other hand, the injector 30 is mounted by biasing a predetermined distance in one direction from the center of the upper end of the dosing main body 10 by the boss member 15 mentioned above, the rounded portion 51 of the guide member 50 Can be sprayed towards.

즉, 상기 인젝터(30)로부터 분사되는 환원제가 구멍들(53)이 형성된 가이드부재(50)의 라운드부(51)를 향하여 분사되기 때문에, 초기 분사 시, 도징 본체(10)에 대한 벽면 충돌을 방지할 수 있다.That is, since the reducing agent injected from the injector 30 is injected toward the round part 51 of the guide member 50 in which the holes 53 are formed, a wall collision with the dosing main body 10 is prevented during the initial injection. It can prevent.

본 실시 예에서, 상기 배플부재(70)는 배기가스가 유입될 수 있는 유입부(11)를 형성하며, 배기가스의 유동을 유입부(11) 측으로 유도하고, 배기가스의 축방향 유동을 막아 환원제의 직진성을 유도하기 위한 것이다. In the present embodiment, the baffle member 70 forms an inlet 11 through which the exhaust gas can be introduced, induces the flow of the exhaust gas to the inlet 11, and prevents the axial flow of the exhaust gas. It is for inducing the straightness of the reducing agent.

이러한 배플부재(70)는 도징 본체(10)의 내 벽면과 가이드부재(50)에 고정되는 바, 도징 본체(10)에 대하여 유입부(11)를 제외한 부분을 커버링 하는 플레이트 형태로 이루어진다.The baffle member 70 is fixed to the inner wall surface of the dosing main body 10 and the guide member 50, and is formed in a plate shape covering a portion of the dosing main body 10 except for the inlet portion 11.

즉, 상기 배플부재(70)는 가이드부재(50)에 고정되면서 도징 본체(10)의 내 벽면에 고정됨에 따라 그 가이드부재(50)의 형상에 상응하는 유입부(11)를 형성하게 된다.That is, the baffle member 70 is fixed to the guide member 50 while being fixed to the inner wall of the dosing main body 10 to form the inlet 11 corresponding to the shape of the guide member 50.

그리고, 상기 배플부재(70)는 유입부(11)를 제외한 가이드부재(50)와 도징 본체(10) 내 벽면 사이를 커버링하면서 배기가스의 유동 통로(71)를 형성하는 바, 가이드부재(50)의 타단부와 도징 본체(10) 내 벽면 사이가 배기가스의 유입구로서 이루어진다.In addition, the baffle member 70 forms a flow passage 71 of the exhaust gas while covering the guide member 50 except the inlet portion 11 and the wall surface of the dosing main body 10, and the guide member 50. Between the other end of the) and the wall surface in the dosing body 10 is made as the inlet of the exhaust gas.

여기서, 상기 배플부재(70)는 배기가스의 유동을 유입부(11) 측으로 유도하기 위해 도징 본체(10)의 다른 한쪽 면에 대하여 유입부(11) 측으로 경사지게 배치되는 것이 바람직하다.Here, the baffle member 70 is preferably inclined toward the inlet 11 with respect to the other side of the dosing main body 10 to guide the flow of the exhaust gas to the inlet 11 side.

따라서, 상기와 같이 구성되는 본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈(100)에 의하면, DOC(1)와 DPF(3)를 거친 배기가스는 도징 본체(10)의 배플부재(70)에 의해 유입부(11) 측으로 유도되면서 그 유입부(11)로 유입된다.Therefore, according to the dosing module 100 for the exhaust gas aftertreatment system of a vehicle according to the exemplary embodiment of the present invention configured as described above, the exhaust gas passing through the DOC 1 and the DPF (3) is the dosing main body 10 Induced by the baffle member 70 of the inlet side 11 is introduced into the inlet 11.

도 4a 및 도 4b를 참조하여 본 실시 예에 의한 도징 모듈(100)의 작용을 설명하면, 배기가스는 가이드부재(50)의 라운드부(51)에 부딪히면서 강한 선회류를 발생시키며 가이드부재(50)와 도징 본체(10) 내 벽면 사이의 유동 통로(71)로 유입된다.Referring to FIGS. 4A and 4B, the action of the dosing module 100 according to the present embodiment will be described. Exhaust gas strikes the round part 51 of the guide member 50 to generate strong swirl flow, and guide member 50. ) And the flow passage 71 between the wall surface in the dosing body 10.

이러는 과정에서, 인젝터(30)는 환원제를 분사하는데, 보스부재(15)에 의해 도징 본체(10)의 상단부 정 중앙에서 한 쪽 방향으로 일정 거리 치우치게 장착되어 있기 때문에 가이드부재(50)의 라운드부(51)를 향하여 분사하게 된다.In this process, the injector 30 injects a reducing agent, and is rounded of the guide member 50 because the boss member 15 is mounted at a predetermined distance from the center of the upper end of the dosing main body 10 in one direction. It is sprayed toward (51).

그리고, 상기 배플부재(70)는 배기가스의 축방향 유동을 막아 인젝터(30)로부터 분사되는 환원제의 직진성을 유도할 수 있게 된다.In addition, the baffle member 70 may prevent the axial flow of the exhaust gas to induce the straightness of the reducing agent injected from the injector 30.

본 실시 예에서는 상기 인젝터(30)로부터 분사되는 환원제가 구멍들(53)이 형성된 가이드부재(50)의 라운드부(51)를 향하여 분사되기 때문에, 초기 분사 시, 도징 본체(10)에 대한 환원제의 벽면 충돌을 방지할 수 있다.In the present embodiment, since the reducing agent injected from the injector 30 is injected toward the round part 51 of the guide member 50 having the holes 53 formed therein, the reducing agent for the dosing main body 10 during the initial injection. Can prevent wall collision.

한편, 본 실시 예에서는 상기와 같이 인젝터(30)로부터 분사되는 환원제가 고온의 가이드부재(50)에 충돌하면서 환원제의 미립화를 촉진할 수 있게 되고, 배기가스와 환원제의 혼합 시간을 확보할 수 있게 된다.Meanwhile, in the present embodiment, as described above, the reducing agent injected from the injector 30 may collide with the high temperature guide member 50 to promote atomization of the reducing agent, and to ensure a mixing time of the exhaust gas and the reducing agent. do.

그리고, 상기 환원제는 가이드부재(50)의 구멍들(53)을 통해 유입되는 배기가스와 충돌하며 혼합되면서 미립화가 촉진될 수 있다. 그리고, 환원제는 상기 유동 통로(71)에 형성된 배기가스의 강한 선회류에 의해 배기가스와의 혼합 균일도가 향상된다.In addition, the reducing agent may be mixed with the exhaust gas introduced through the holes 53 of the guide member 50, thereby promoting atomization. The reducing agent improves the uniformity of mixing with the exhaust gas by the strong swirl flow of the exhaust gas formed in the flow passage 71.

따라서, 본 실시 예에서는 도징 본체(10)에서 환원제가 배기가스의 열에 의해 암모니아(NH3)로 전환되며, 연결부(13)를 통해 SCR(5: 도 1 참조)로 유입되는데, 그 연결부(13)의 벤츄리 효과에 의해 SCR(5)의 전 영역에서 질소산화물 반응이 이루어지게 된다.Therefore, in the present embodiment, the reducing agent is converted into ammonia (NH 3 ) by the heat of the exhaust gas in the dosing main body 10, and flows into the SCR 5 (see FIG. 1) through the connection part 13, and the connection part 13. Due to the Venturi effect of), the nitrogen oxide reaction occurs in the entire region of the SCR (5).

지금까지 설명한 바와 같이 본 발명의 예시적인 실시 예에 따른 차량의 배기가스 후처리 시스템용 도징 모듈(100)은 곡관 부위로 환원제를 분사하거나 배기관에 믹서를 설치하지 않고서도 월 웨팅 현상을 방지할 수 있다.As described above, the dosing module 100 for the exhaust gas aftertreatment system of the vehicle according to the exemplary embodiment of the present invention may prevent the wall wetting phenomenon without spraying the reducing agent to the curved portion or installing the mixer in the exhaust pipe. have.

이로써 본 실시 예에서는 차량 레이아웃의 제약을 받지 않고, 배기가스와 환원제 분무의 혼합 촉진, 균일도 향상 및 반응 활성화에 따른 SCR(5)의 효율을 증대시킬 수 있게 된다.As a result, the present embodiment can increase the efficiency of the SCR 5 by promoting the mixing of the exhaust gas and the reducing agent spray, improving the uniformity, and activating the reaction without being restricted by the vehicle layout.

이상을 통해 본 발명의 바람직한 실시 예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명의 범위에 속하는 것은 당연하다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And it goes without saying that the invention belongs to the scope of the invention.

1... DOC 3... DPF
5... SCR 10... 도징 본체
11... 유입부 12... 연결 통로
13... 연결부 15... 보스부재
17... 장착 브라켓 30... 인젝터
50... 가이드부재 51... 라운드부
53... 구멍 70... 배플부재
71... 유동 통로1 ... DOC 3 ... DPF
5 ... SCR 10 ... Dosing Body
11 ... inlet 12 ... connecting passage
13 ... Connection 15 ... Boss member
17 ... Mounting bracket 30 ... Injector
50 ... Guide member 51 ... Round part
53 ... hole 70 ... baffle member
71 ... flow passage

Claims (11)

SCR의 전방에서 배기가스의 유동 방향을 따라 환원제를 분사하기 위한 차량의 배기가스 후처리 시스템용 도징 모듈로서,
상기 SCR과 연결될 수 있는 연결부와, 배기가스가 유입될 수 있는 유입부를 지닌 도징 본체;
상기 도징 본체에 구비된 보스부재에 장착되며 상기 환원제를 상기 도징 본체의 내부로 분사하는 인젝터; 및
상기 도징 본체의 내부에 설치되며 상기 유입부를 통해 도징 본체로 유입되는 배기가스의 유동을 일정 경로로 가이드 하는 가이드부재를 포함하며,
상기 가이드부재는 상기 도징 본체에 대해 상기 연결부와 유입부 측을 구획 형성하는 플레이트 형태로 이루어지며, 상기 유입부 측에서 상기 도징 본체의 내 벽면에 일단부가 고정되고 타단부가 상기 내 벽면으로부터 떨어지며 라운드 형태로 굴곡지게 이루어지는 차량의 배기가스 후처리 시스템용 도징 모듈.A dosing module for an exhaust gas aftertreatment system of a vehicle for injecting a reducing agent along the flow direction of the exhaust gas in front of the SCR,
A dosing body having a connection portion which can be connected to the SCR, and an inlet portion through which exhaust gas can be introduced;
An injector mounted on the boss member provided in the dosing main body and injecting the reducing agent into the dosing main body; And
It is installed in the dosing body and includes a guide member for guiding the flow of the exhaust gas flowing into the dosing body through the inlet in a predetermined path,
The guide member is formed in the form of a plate for partitioning the connection portion and the inlet side with respect to the dosing body, one end is fixed to the inner wall surface of the dosing body at the inlet side and the other end is rounded off from the inner wall surface A dosing module for an exhaust gas aftertreatment system of a vehicle which is curved in a shape. 삭제delete 삭제delete 제1 항에 있어서,
상기 가이드부재에는 다수의 구멍들이 형성되는 차량의 배기가스 후처리 시스템용 도징 모듈.The method according to claim 1,
A dosing module for an exhaust gas aftertreatment system of a vehicle having a plurality of holes formed in the guide member. 제4 항에 있어서,
상기 도징 본체에는,
상기 가이드부재와 결합되며 상기 유입부를 형성하는 배플부재가 설치되는 차량의 배기가스 후처리 시스템용 도징 모듈.5. The method of claim 4,
In the dosing body,
Dosing module for the exhaust gas after-treatment system of the vehicle is coupled to the guide member and the baffle member to form the inlet is installed. 제5 항에 있어서,
상기 배플부재는,
상기 도징 본체에 대하여 상기 유입부를 제외한 부분을 커버링 하는 플레이트 형태로 이루어지는 차량의 배기가스 후처리 시스템용 도징 모듈.6. The method of claim 5,
The baffle member,
A dosing module for an exhaust gas post-treatment system for a vehicle, which has a plate shape covering a portion of the dosing body except the inflow portion. 제6 항에 있어서,
상기 배플부재는,
상기 가이드부재와 도징 본체의 내 벽면 사이에 배기가스의 유동 통로를 형성하는 차량의 배기가스 후처리 시스템용 도징 모듈.The method of claim 6,
The baffle member,
A dosing module for an exhaust gas aftertreatment system of a vehicle, which forms a flow passage of exhaust gas between the guide member and an inner wall surface of the dosing body. 삭제delete 제1 항에 있어서,
상기 인젝터는,
상기 보스부재에 배기가스의 유동 방향을 따라 경사지게 장착되는 차량의 배기가스 후처리 시스템용 도징 모듈.The method according to claim 1,
The injector,
Dosing module for the exhaust gas after-treatment system of the vehicle is mounted to the boss member inclined along the flow direction of the exhaust gas. 제9 항에 있어서,
상기 인젝터는,
상기 가이드부재의 라운드 부위를 향하여 환원제를 분사하는 차량의 배기가스 후처리 시스템용 도징 모듈.10. The method of claim 9,
The injector,
A dosing module for an exhaust gas aftertreatment system of a vehicle for injecting a reducing agent toward a round portion of the guide member. 제1 항에 있어서,
상기 연결부는,
상기 SCR과 상호 연결되는 연결 통로를 상기 도징 본체의 하부에 형성하는 차량의 배기가스 후처리 시스템용 도징 모듈.The method according to claim 1,
The connecting portion
A dosing module for an exhaust gas aftertreatment system for a vehicle, which forms a connection passage interconnected with the SCR under the dosing body.
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US13/174,075 US20120144812A1 (en) 2010-12-09 2011-06-30 Dosing module for exhaust post treatment system of vehicle
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